Oxide coated cutting tool and method for the preparation thereof

摘要

The present invention provides a body coated with refrac tory single- or multilayers one of which consists of single-phase kappa -Al2O3 characterized by controlled microstructure with crystal planes preferably grown in the (210)-direction with respect to the surface of the coated body. The coated tool according to the invention exhibits increased wear properties when machining ball bearing steel.